Breast pump



FIG. 1 is a left side view of the breast pump the right side being a mirror image thereof;

FIG. 2 is a front side view of the breast pump of FIG. 1;

FIG. 3 is a back side view of the breast pump of FIG. 1;

FIG. 4 is a top and front perspective view of the breast pump of FIG. 1;

FIG. 5 is a top and back view of the breast pump of FIG. 1;

FIG. 6 is a bottom, left and front perspective view of the breast pump of FIG. 1; and,

FIG. 7 is a left, back and top perspective view of the breast pump of FIG. 1.

The broken lines in the drawings illustrate portions of the breast pump which form no part of the claimed design. 

CLAIM The ornamental design for a breast pump, as shown and described. 